“Air Pollution Prevention and control” Government Engineering College Rajkot Submitted by Vidja Nipul M. (130200106061)

What is Pollution Prevention? Pollution prevention is the elimination or prevention of wastes (air emissions, water discharges, or solid/hazardous waste) at the source. In other words, pollution prevention is eliminating wastes before they are generated. Pollution prevention approaches can be applied to all pollution generating activity: hazardous and nonhazardous, regulated and unregulated. Pollution prevention does not include practices that create new risks of concern.

Pollution Prevention Strategies Pollution prevention [vs. control] offers important economic benefits and at the same time allows continued protection of the environment. While most pollution control strategies cost money, pollution prevention has saved many firms thousands of dollars in treatment and disposal costs. More importantly, pollution prevention should be viewed as a means to increase company productivity. By reducing the amount of raw materials that are wasted and disposed of; manufacturing processes become more efficient, resulting in cost savings to the company.

SOURCE REDUCTION Product Changes Designing and producing a product that has less environmental impact Changing the composition of a product so that less hazardous chemicals are used in, and result from, production Using recycled materials in the product Reusing the generated scrap and excess raw materials back in the process Minimizing product filler and packaging Producing goods and packaging reusable by the consumer Producing more durable products

Input Material Changes Material substitution Using a less hazardous or toxic solvent for cleaning or as coating Purchasing raw materials that are free of trace quantities of hazardous or toxic impurities

Equipment and Process Modifications Changing the production process or flow of materials through the process. Replacing or modifying the process equipment, piping or layout. Using automation. Changing process operating conditions such as flow rates, temperatures, pressures and residence times. Implementing new technologies

Good Operating Practices Instituting management and personnel programs such as employee training or employee incentive programs that encourage employees to reduce waste. Performing good material handling and inventory control practices that reduce loss of materials due to mishandling, expired shelf life, or improper storage. Preventing loss of materials from equipment leaks and spills. Segregating hazardous waste from non-hazardous waste to reduce the volume of hazardous waste disposed.

Control of Gaseous Pollutants Absorption Adsorption Oxidation Reduction

Control of Particulate Pollutants Spray chamber Cyclone Bag house Venturi Electrostatic Precipitator (ESP)

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